According to the resolution of 1975 15 international metrology conference, the value of the speed of light in vacuum is set as c = 299,792,458 m/s, and in general application, it is set as c = 3×108 m/s.
The electric propagation speed of electrons in vacuum is 299,792,458 m/s, which is close to the speed of light. However, due to the resistance of matter formation, the speed of electrons moving in a conductor is generally much lower than the speed of light. Because electrons have mass, the speed of electrons in vacuum can only approach the speed of light, but not reach the speed of light.
About the speed of electricity: the speed of light is the speed of photon movement, and the speed of electricity refers to the speed of electric field (some people say that the speed of electrical signals is actually the same), not the speed of electron movement. Electrons in wires can move several meters per second (macro speed), which is already a very high speed.
Extended content:
Light is a physical term, and its essence is photon flow in a specific frequency band. The light source emits light because the electrons in the light source gain extra energy. If the energy is not enough to make it jump into outer orbit, electrons will accelerate and release energy in the form of waves; On the contrary, electrons jump. If the transition just fills the vacancy in the orbit and reaches the steady state from the excited state, the electron will not move; On the contrary, electrons will jump back to their previous orbits and release energy in the form of waves.
Simply put, light travels in a straight line. In general relativity, because light is influenced by the strong gravitational field of an object, the propagation path of light deflects accordingly.
Electricity is a natural phenomenon, which refers to the phenomenon brought about by charge movement. Lightning in nature is an electrical phenomenon. Electricity is the property of repulsion and attraction between subatomic particles such as electrons and protons. It is one of the four basic interactions in nature. There are two kinds of electron motion phenomena: we say that atoms lacking electrons are positively charged and atoms with redundant electrons are negatively charged.
Electricity is a general term, which is a physical phenomenon caused by static charge or dynamic charge. In nature, the mechanism of electricity gives many well-known effects, such as lightning, triboelectrification, electrostatic induction, electromagnetic induction and so on.